The rack was fine for driving, it was just a pain to take it off and I didn't have a good place to do it at home. The roof tent weighs about 160 pounds and I can tell a little difference with the wind, but not much on the weight.
The van is great in the summer with four people and two dogs, but my kids are in high school so by the time I really get an interior build done we will probably be two people and two dogs. For bad weather/winter we have decided that we want something bigger.